1. Continuous caudal anesthesia during labor and delivery;Hingson;Anesth. & Analg.,1942
2. Controllable spinal anesthesia in obstetrics;Pitkin;Surg., Gynec. & Obst.,1928
3. Pontocaine-glucose solution for spinal anesthesia;Sise;S. Clin. North America,1935
4. Simplified technique for spinal anesthesia using nupercaine;Roman-Vega;Anesth. & Analg.,1946